JPH08245304A - Incense - Google Patents

Abstract

PURPOSE: To obtain a lightweight incense having a prescribed sectional area, securing a combustion time similar to or longer than that a the conventional incense, having improved safety and volatilization ratio of an active ingredient, by adjusting an incense base mixed with a combustion retarder such as precipitated magnesium carbonate light to the combustion rate equal to or smaller than a specific value. CONSTITUTION: This incense has 3-18mm<2> sectional area and is obtained by mixing an incense base with one or more combustion retarders selected from preferably 5-45wt.% (based on the whole weight of the incense) of precipitated magnesium carbonate light, preferably 5-50wt.% of an organic acid hydrazide, preferably 7-50wt.% of rice bran and preferably 5-45wt.% of aluminum hydroxide so as to adjust the combustion rate of the incense base to <100mm/hr.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to incense sticks such as mosquito coil and Buddhist altar sticks, and more particularly to a thin and light incense stick with a combustion retardant to slow the burning rate.

[0002]

BACKGROUND OF THE INVENTION As is well known, incense sticks such as mosquito coil and Buddhist altar sticks are used as burners or burners (burning bases) such as powders of pyrethrum-extracted lees powder, wood powder, foliage powder of tea, etc. Powder, binder such as corn starch, fungicide such as dehydroacetic acid, and pigment such as malachite green are used as incense bases. Insecticide for mosquito coil and fragrance for Buddhist altar. Add a suitable amount of water to a mixture of ingredients and knead. Extrude into a predetermined shape with a weight and size that smokes for about 7 hours for mosquito coil and about 40 to 50 minutes for Buddhist altar incense. It is manufactured by punching or extrusion and drying.
As a raw material for the above-mentioned combustion base, although it was produced in Japan for a long time in time, the production amount gradually decreased, and recently, most raw materials are imported from overseas and used. However, nowadays, there are also voices of shortages of raw materials overseas, and the costs are rising accordingly. Under these circumstances, in order to secure a stable supply of raw materials in the future,
From the standpoints of protecting the natural environment and saving resources, it is earnestly desired to reduce the amount of incense raw materials used.

[0003] Conventionally, as an alternative material to the above-mentioned raw materials for incense sticks, for example, coffee bean hull endothelium powder (Japanese Patent Publication No. 60-5)
8201) and corn core powder (Japanese Patent Publication No. 61-
No. 11922) has been proposed, but the development points of these are mainly to suppress smoke generation, mucous membrane irritation, and offensive odor generation during combustion. On the other hand, JP-A-48-72
No. 336 proposes to use mineral fine powders such as talc, clay, diatomaceous earth, kaolin, bentonite, and silicic acid anhydride as a part of the incense base. However, in the case of using such a fine mineral powder, if the amount of the binder that is usually used is blended to make the product hardness sufficient, it is obtained with an increase in the blending amount of the fine mineral powder. The flammability of the product deteriorates and the extinguishing occurs. On the other hand, if the amount of the binder is reduced to improve the flammability and eliminate the extinguishing,
The strength of the molded product is remarkably reduced and it becomes impractical.

From the point of view of resource saving, the burning time of the incense base is rather increased so that the same burning time as the conventional one can be secured even if the weight and size of the incense base are reduced. It is desired to develop a new base. However, in this case, it is necessary to satisfy at the same time that the incense stick does not disappear and continues to burn for a predetermined time, and that the volatilization rate of the active ingredient is high. Also,
In order to reduce the size and weight of the incense stick, it is required that the strength is excellent in machineability and does not change, that is, it must have a certain degree of bending strength, and as mentioned above, it can be stably and inexpensively supplied as a base material. Required. Japanese Unexamined Patent Publication (Kokai) No. 48-62946 teaches that the extracted meal powder of Dutch senichi or Kibana nectar senchin plant is effective for delaying the burning rate of incense sticks. However, it is doubtful that they satisfy the above conditions, and there are problems in terms of cost and stable supply.

As another measure for delaying the burning speed of incense sticks, Japanese Patent Publication No. 46-218119 discloses that an inorganic layer containing an insecticidal component is attached to the surface of the incense stick base to delay the burning speed of mosquito coils. Is taught. However, in order to extend the burning time sufficiently, use a large amount of inorganic substances,
Although it is necessary to thicken the inorganic layer, in this case, there is a drawback that causes the decomposition of the active ingredient, and a complicated manufacturing process of forming the inorganic layer on the surface of the incense base is required, which is a factor of cost increase. Become. From this, it is hard to say that the manufacturing method is suitable for the incense produced in large quantities at low cost.

[0006]

Generally, in order to delay the burning rate of incense sticks, the base is hardened by increasing the compounding amount of the binder, or the base is increased by increasing the degree of pressure during molding. Should be hard. However, in both cases, the extinction occurs at the time of combustion, and the volatilization rate of the active ingredient decreases. That is, the delay of the combustion speed and the extinction at the time of combustion have a difficult integrated relationship, and if the combustion speed is delayed, extinction is likely to occur, while it is necessary to secure sufficient combustibility to prevent extinction. Becomes Heretofore, no incense base has been found that simultaneously satisfies such conflicting requirements. This is because conventional incense sticks, such as mosquito coil, have a thickness of about 3.5 mm.
The width is about 6 mm (cross-sectional area is about 21 mm ² ) and the length is about 75 cm after a burning time of 7 hours (weight is about 14 g), which is almost unchanged from old times.

Therefore, an object of the present invention is to reduce the amount of the incense base by slowing the burning rate as compared with the conventional incense, and to reduce the amount of the incense weight and the size of the incense compared to the conventional incense, but to burn ( Providing incense sticks such as mosquito coil and incense sticks for Buddhist altars that can secure a burning (smoke) time equal to or more than conventional incense without causing extinction during smoking, and can improve the volatilization rate of active ingredients, Therefore, it is intended to conserve resources by reducing raw materials and improve safety for human health by reducing smoke and tar generation.

[0008]

In order to achieve the above object, according to the present invention, a cross-sectional area of 3-18 mm ² is provided,
And, the burning rate of the incense base is less than 100 mm / hr by blending the incense base with at least one combustion retardant selected from the group consisting of light magnesium carbonate, organic acid hydrazide, rice bran and aluminum hydroxide. An incense stick characterized by being adjusted to be provided. The blending amount of each of the above combustion retardants is 5 to 45% by weight in the case of light magnesium carbonate, 5 to 50% by weight in the case of organic acid hydrazide, and 7 to 50% by weight in the case of rice bran, based on the total weight of incense. In the case of aluminum hydroxide, the proportion of 5 to 45% by weight is preferable. Among the above combustion retardants, light magnesium carbonate, organic acid hydrazide and rice bran are preferable, and these can be blended alone or in combination of two or more kinds. When a plurality of types of the above combustion retardants are used in combination, the total amount thereof is preferably in the range of 5 to 50% by weight based on the total weight of the incense stick.

[0009]

The present inventors have found that by reducing the thickness of the incense stick, the decomposition of the active ingredient can be suppressed, the volatilization rate of the active ingredient can be improved, and at the same time, it is effective in preventing extinction. It was Furthermore, as a result of studying various materials as an incense base for incense sticks having such a reduced thickness, the present inventors have found that light magnesium carbonate, organic acid hydrazide, rice bran, and aluminum hydroxide materials burn incense sticks. It is effective in delaying the speed, and by blending these as a part of the incense base, the burning time can be lengthened without fear of extinguishing at the time of burning, so that even if the weight and size are reduced, it will be The present inventors have completed the present invention by discovering that a burning time of the same degree or more can be secured and the amount of the incense raw material used can be reduced. That is,
The basic feature of the present invention is that the cross-sectional area of the incense stick is 3 to 18 mm.
^{In addition to 2} , the incense base was blended with at least one burning retardant selected from the group consisting of light magnesium carbonate, organic acid hydrazide, rice bran and aluminum hydroxide to increase the burning rate of the incense base to 100 mm / This is because the incense is adjusted to be less than hr, thereby satisfying the contradictory requirements of delaying the burning rate and preventing extinction at the same time in the incense with reduced weight and size, and ensuring a high volatilization rate of the active ingredient. It makes it possible.

Generally, when the same base material is used, the burning speed becomes faster as the thickness of the incense stick becomes thinner, and if the cross-sectional area is reduced to half, the length should be set to ensure the same burning time. It must be doubled, and size reduction does not lead to weight loss. Further, the conventional incense stick has a burning speed of 100 to 120 mm / hr, and it is considered that the incense stick having a burning speed of less than this causes extinction at the time of burning. It causes fading. On the other hand, according to the present invention, the cross-sectional area of the incense stick is set to 3 to 18 mm ² so as to prevent the extinction from happening, and the burning rate is less than 100 mm / hr which is slower than that of the conventional incense stick by blending the combustion retardant. It is adjusted so that the burning speed is delayed without extinguishing at the time of burning, and despite the weight and size being reduced, a burning time equal to or more than that of the conventional incense stick can be secured,
As a result, the usage fee for the incense raw material is drastically reduced.

The above points will be described in more detail. According to the research conducted by the present inventors, the thickness (cross-sectional area) of incense sticks is shown.
It has been found that when the value is reduced, the volatilization rate of the active ingredient contained in the incense is improved, and the extinction is less likely to occur, and such an effect can be obtained in the range of the cross-sectional area of 0.75 to 18 mm ^2. It was However, as the thickness of the incense sticks is reduced, the burning speed increases rapidly, and it is necessary to make the length of the incense sticks very long in order to secure a long burning time. I can't. Therefore, in the present invention, light magnesium carbonate, organic acid hydrazide, rice bran, and / or aluminum hydroxide, that is, a material having an effect of delaying the burning rate of the incense base is blended to slow the burning rate, thereby , The effect of increasing the burning rate by reducing the thickness of the incense stick was diminished, and 100 mm / s slower than the conventional incense stick even though the incense stick thickness was reduced without causing extinction during burning.
The combustion speed is adjusted to be less than hr. However, if the burning speed of the incense stick is set to be extremely lower than that of the conventional incense stick, the amount of the combustion retardant added will be extremely large and the extinguishing will easily occur at the time of burning, which is not preferable. Considering practicality, it is preferable to adjust the burning rate to 85 mm / hr or more. For the same reason, the cross-sectional area of the incense must be set within a range of 3～18Mm ^2, also considering the volatilization rate and the like of the active ingredient, the cross-sectional area of 7 mm ² or more, 16 mm ² or less. If the thickness of the incense stick is made extremely small, the effect of delaying the burning speed decreases, and conversely, the thickness of the incense stick is the same as that of the conventional incense stick (cross-sectional area about 21 m.
m ² ), the effect of reducing the combustion weight tends to decrease.

As described above, by reducing the thickness of the incense stick (the cross-sectional area is 3 to 18 mm ² ), it is effective in suppressing extinction and improves the volatilization rate of the active ingredient.
That is, the active ingredient contained in the incense stick is generally decomposed at the high temperature of the burning portion, but is gradually vaporized from the portion heated by the heat transfer in the vicinity thereof. Therefore, when the cross-sectional area of the incense stick is large, the combustion propagates to the active ingredient contained in the central portion of the heated portion before it is vaporized, and the decomposition rate of the active ingredient increases. On the other hand, when the thickness of the incense stick is reduced, the distance from the central portion to the surface is short, so that the active ingredient contained in the central portion is efficiently volatilized at the heating portion near the burning portion. For example,
Approximately 20 to 50% by weight of pyrethrum extracted lees powder, 10 to 30% by weight of wood flour, 20 to 30% by weight of pepper powder as a combustion base, and 0.3% by weight of pinamine forte as an insecticidal ingredient, and various combustion. To obtain speed, 5-30% by weight of ash, 1-10% by weight of α-starch, 0.5-5% by weight of combustion improver are used, and other malachite green, emulsifier, etc. are added and mixed to obtain approximately equal amount. According to the mosquito coil incense produced by adding the hot water of Example ¹ and kneading the mixture with an extruder, the cross-sectional area was 20 to 25 mm ² and the volatilization rate of the insecticidal component was 62 ± 3%, while the cross-sectional area was 7.0 mm ^2. A volatilization rate of 82.2% was obtained, and the volatilization rate of the active ingredient was greatly improved. Moreover, like the present invention,
By delaying the burning rate of the incense stick, the propagation of the combustion becomes slower, the rate of decomposition of the active ingredient becomes lower, and the volatilization rate of the active ingredient improves. In addition, by reducing the thickness of the incense stick, the burning weight per unit burning time is also reduced, and as a result, the amount of smoke and tar that are irritating to the mucous membranes is also reduced, improving the safety of human health. The effect is also obtained.

The present invention is naturally applicable not only to mosquito coil incense sticks but also to Buddhist altar sticks. In the case of incense sticks for Buddhist altars, the cross-sectional area is preferably about 3 mm ² or more from the viewpoint of molding and mechanical strength as a product. In the case of incense sticks for Buddhist altars, the amount of raw materials used can be greatly reduced by shortening the length of the incense sticks, and a burning (smoking) time equal to or longer than that of conventional incense sticks can be secured.

As described above, in the present invention, the cross-sectional area of the incense stick is set to 3 to 18 mm ^2, and light magnesium carbonate, organic acid hydrazide, rice bran, and / or aluminum hydroxide are used as a part of the incense stick base. One of the combustion retardants of
By mixing more than one species, the burning rate of the incense base can be reduced to 1
It is adjusted to less than 00 mm / hr, but can be adjusted by supplementarily changing the compounding amount of the binder.
It is also possible to add another substance having a flame retarding effect, or to increase the pressure applied during molding to make adjustment. However, since such an auxiliary combustion retardation means easily causes extinction at the time of combustion, it is desirable to stop the combustion speed only by a slight adjustment.

When light magnesium carbonate is used as the combustion retardant, it is contained in an amount of 5% by weight or more, 45% or more based on the total weight of the incense.
By blending in a proportion of not more than 10% by weight (preferably not less than 10% by weight and not more than 30% by weight), the burning rate can be delayed without fear of extinguishing at the time of burning. When the cross-sectional area is 3-18 mm ² , 70-
It becomes 100 mm / hr. Magnesium carbonate has light magnesium carbonate and heavy magnesium carbonate depending on the difference in specific gravity, but heavy magnesium carbonate has little effect of delaying the burning rate.

When an organic acid hydrazide is used as a combustion retardant, it is 7% by weight or more and 50% by weight or less (preferably 10% by weight or more and 40% by weight or less) based on the total weight of incense.
By blending in the proportion of, the burning speed can be delayed without fear of extinction of the burning, and the burning speed at that time is
When the incense has a cross-sectional area of 3 to 18 mm ² , 70 to 100
mm / hr. As the organic acid hydrazide, adipic acid dihydrazide, carbodihydrazide, malonic acid dihydrazide, succinic acid dihydrazide, stearic acid hydrazide, sebacic acid dihydrazide, dodecanedioic acid dihydrazide, isophthalic acid dihydrazide and the like can be used.

When rice bran is used as a combustion retardant,
By blending in a proportion of 7% by weight or more and 50% by weight or less (preferably 10% by weight or more and 45% by weight or less) with respect to the total weight of the incense stick, the burning rate can be delayed without fear of extinction during burning. The burning rate at that time is 70 to 100 mm / hr when the thickness of the incense stick has a cross-sectional area of 3 to 18 mm ^2.
Becomes

When aluminum hydroxide is used as the combustion retardant, it is added in a proportion of 5% by weight or more and 45% by weight or less (preferably 10% by weight or more and 40% by weight or less) with respect to the total weight of the incense. The burning rate can be delayed without fear of extinction during burning, and the burning rate at that time is 70 to 70 when the cross sectional area of the incense stick is 3 to 18 mm ^2.
It becomes 100 mm / hr. Further, by adding aluminum hydroxide, the color of the pigment to be added becomes more vivid, and the appearance color is vivid and bright incense is obtained.

In the present invention, not only the above-mentioned combustion retardant may be blended, but also the burning rate of the incense stick may be supplementarily adjusted by changing the blending amount of the binder. In this case, the binder is 5% by weight based on the total weight of the incense stick.
25 wt% or less (preferably 8 wt% or more, 20
It is preferable to mix it at a ratio of (wt% or less). Current,
As the binder, water-soluble polymer binders such as pepper powder and starch are mainly used. In the present invention, in addition to pepper powder, water-soluble binders such as corn starch, tapioca starch, wheat starch, sodium alginate, dextrin, collagen, methyl cellulose, carboxyethyl cellulose, polyvinyl alcohol, sodium polyacrylate, carboxymethyl starch, etc. Although it is preferable to use a viscous polymer viscous agent, it is needless to say that it can also be used as a pepper powder.

The base of the incense stick according to the present invention includes burning bases such as pyrethrum extracted lees, wood flour, foliage powder such as tea, binders such as camphor flour and corn starch, thickeners such as cellulose, calcium phosphate. Known materials such as a combustion retardant can be used, and any incense stick having a property that the combustion rate thereof is less than 100 mm / hr can be used by adding the above-mentioned combustion retardant. As the burning base for incense, in addition to the above-mentioned pyrethrum extract lees powder, wood flour, foliar powder such as tea, coconut powder, coffee bean hull endothelium powder, corn core powder, carbon, various conventionally known burning bases. Agents or combustion improvers can be used. When the incense stick of the present invention is used as a mosquito coil, various conventionally known insecticides can be used as the insecticidal active ingredient, but from the viewpoint of safety, pinamine forte and Etok (both Sumitomo Chemical Co., Ltd. Pyrethroid-based insecticides such as a registered trademark of a commercial product). In addition to the above-mentioned various components, a pigment such as malachite green or the like, and a fungicide such as dehydroacetic acid or the like can be added to the incense stick of the present invention.

The incense stick according to the present invention is obtained by kneading the above-mentioned various components with water or warm water and molding into an appropriate shape, and depending on the active ingredient (insecticidal component or fragrance, etc.) to be blended, a mosquito coil. Or it can be used as an incense stick for Buddhist altars. In the case of a mosquito coil, it is generally produced by kneading a compound containing an insecticidal component with water, extrusion-molding it into a sheet, punching it into a spiral shape, and drying. In addition,
The active ingredient can be impregnated by spraying, coating, dropping, dipping or the like after incense molding.

Regarding the effect of the incense sticks containing the above-mentioned materials of the present invention on the active ingredient, by making the thickness of the incense sticks within the above-mentioned cross-sectional area range, more preferably, by approaching the cross-sectional area of 7 mm ² , The decomposition of the active ingredient is reduced, and the reduction of the volatilization rate of the active ingredient can be suppressed. However, as the mixing ratio of the combustion retardant increases, the cross-sectional area becomes extremely small and large, and the density of the incense stick becomes high, that is, the strength becomes strong, so that the decomposition of the active ingredient tends to increase. is there. This tendency is particularly great when the amount of the binder is large. In such a case, it is effective to treat the active ingredient on the surface of the incense stick after molding by operations such as spraying, coating, printing, dropping and adhering.

[0023]

EXAMPLES The present invention will be described in more detail below with reference to test examples and examples, but it goes without saying that the present invention is not limited to the following examples. In the following test examples, the burning rate and the burning weight were measured as follows. Cut the incense stick to a length of 200 mm,
The weight (W ₁ ) is measured. The incense stick is ignited and left for about 5 minutes, then the weight (W ₂ ) at that time is measured, and the time is immediately measured using a stopwatch. Subsequently, the mixture was burned in a windless place, and the weight (W ₃ ) of the remaining incense stick when just one hour had passed was measured, and the burning rate and the burning weight were determined by the following formulas. Burning speed (mm / hr) = 200 × (W ₂ −W ₃ ) / W ₁ Burning weight (g / hr) = W ₂ −W ₃

Test Example 1 As shown in Table 1, the amount of aluminum hydroxide or wheat starch added was changed and added to a predetermined amount of pyrethrum extracted lees powder, wood powder, tea powder, and pepper powder. , Kneading by adding approximately equal amount of warm water, applying this to an extruder, extruding into a rod shape with a cross-sectional area (Xmm ² ) of various sizes, cutting into a certain length,
The test incense was dried in air. In addition, pinamine forte was used as an active ingredient at this time. A burning test was performed on this incense stick to examine the burning rate and the burning weight. The results are shown in Table 1.

[Table 1]

Test Example 2 In Test Example 1, instead of aluminum hydroxide or wheat starch, as shown in Table 2, light magnesium carbonate,
Using organic acid hydrazide and rice bran, respectively, an incense having a cross-sectional area of 14 mm ² was similarly prepared, and used as a test incense. About this incense stick, the burning test was done and the burning rate and the burning weight were investigated. The results are also shown in Table 2.

[Table 2]

Test Example 3 Pyrethrum extract cake meal 35-45% by weight, wood powder 20-27% by weight, pepper powder 20-30% by weight, wheat starch 6-10% by weight, an incense base as an active ingredient. Pinamine forte was added, mixed, and about equal amount of warm water was added and kneaded, and this was put into an extruder to prepare stick-shaped incense sticks. Incense sample 1
As a commercial incense stick, it has almost the same size (cross-sectional area 21 mm
The incense stick of ² ) is used as incense stick sample 2 and its cross-sectional area is 14 mm.
^Two incense sticks were produced. The incense stick sample 3 was manufactured by spraying a dried rod-shaped incense having the same formulation as in the incense stick sample 2 except that no pinamine forte was added, by spraying a mixed solvent of pinamine forte and a resin, and heat drying. . The burning rate of the incense sample at this time was about 100 mm / hr.
And With respect to this incense stick, the volatilization rate of the active ingredient was measured. Table 3 shows the results.

[Table 3]

Example 1 An incense stick having a cross-sectional area of about 14 mm ² and having a burning time (about 7 hours / roll) that is almost the same as that of a commercially available mosquito coil was used at the following blending ratios for pyrethrum extract cake powder and wood flour. , Tea powder, pepper powder with aluminum hydroxide blended with pinamine forte,
In addition, a predetermined amount of malachite green, antifungal agent, emulsifier, etc. is added and mixed, about equal amount of warm water is added and kneaded, and this is extruded into a band shape by an extruder, and then using a separately manufactured mold. It was punched in a spiral shape with a punching machine and dried by air drying to produce a test incense (the amount of pinamine forte used at this time was the same as that of a 0.3% commercial incense stick). The dimensions and weight of this incense stick are shown in Table 4, and the combustion characteristics are shown in Table 5.
It was as shown in.

[Table 4]

[0028]

[Table 5] When this roll of incense was used in a room of 6 tatami mats, the mosquito was completely exterminated without being sucked by the mosquito over a burning time of 7 hours. Further, when the volatilization rate of the active ingredient was measured for this incense stick, it was found that almost the same numerical value was obtained despite the fact that the burning rate was delayed to about 67% with respect to the commercially available incense stick of 68%. Further, as for the economic effect of the product, the size was 9 cm and the weight was 7 g, which was small compared with the commercially available incense having an outer size of 12 cm and the weight of 14 g, and the amount of the raw material used was greatly reduced.

Example 2 Outer size (about 12 cm / 2) which is almost the same as a commercially available mosquito coil
Of the incense with a cross-sectional area of 14 mm ² and a malachite green, mildew-proofing incense base containing tapioca starch in pesticide chrysanthemum extract meal powder, wood powder, tea powder, and pepper powder in the following mixing ratios. Add a prescribed amount of the agent and mix, add about equal amount of warm water and knead, and extrude this into a strip shape with an extruder,
Then, using a separately manufactured mold, it is punched in a spiral shape by a punching machine, heat-dried, and then a predetermined amount of a solvent containing pinamine forte and a resin is sprayed and applied, and heat-dried to manufacture it. The test incense was used. The size and weight of this test incense are shown in Table 6, and the combustion characteristics are shown in Table 7.
It was as shown in.

[Table 6]

[0030]

[Table 7] When I used this incense stick around an outdoor kennel,
It burned for a very long time of one hour, during which it was not caught by mosquitoes. Furthermore, regarding the economic effect of the product, the outer size of commercial animal incense sticks is 14 to 15 cm, and the burning time is 9 to
Although the size was small, the burning time was long for 10 hours.

[0031]

As described above, the incense stick of the present invention is 3 to 1
In addition to having a cross-sectional area of 8 mm ² , the incense base is burned by adding at least one combustion retardant selected from the group consisting of light magnesium carbonate, organic acid hydrazide, rice bran and aluminum hydroxide. Speed is 100mm / h
Since it is adjusted to be less than r, the burning time is the same as or longer than that of the conventional incense stick without causing extinction at the time of combustion, though the thickness is smaller than that of the conventional incense stick. Therefore, the incense weight and the incense size can be reduced when the burning time is similar to that of the conventional incense stick. As a result, the raw materials used can be reduced, the cost can be reduced, and the resources can be saved. In addition, by delaying the burning rate of the incense stick as in the present invention, the propagation of combustion becomes slower, the rate of decomposition of the active ingredient becomes lower, and the volatilization rate of the active ingredient improves. In addition, by reducing the thickness of the incense stick, the volatilization rate of the active ingredient is further improved, and the burning weight per unit burning time is also reduced, resulting in less mucous membrane stimulating smoke and tar generation. Also, the effect of improving safety for human health can be obtained.

Claims (7)

[Claims] 1. A cross-sectional area of 3 to 18 mm ² , and
Light magnesium carbonate, organic acid hydrazide, incense base,
An incense stick which is prepared by blending at least one burning retardant selected from the group consisting of rice bran and aluminum hydroxide so that the burning rate of the incense base is less than 100 mm / hr. 2. The incense stick according to claim 1, wherein the combustion retardant is light magnesium carbonate, and is contained in an amount of 5 to 45% by weight based on the total weight of the incense stick. 3. The incense stick according to claim 1, wherein the combustion retardant is an organic acid hydrazide, and is added in an amount of 5 to 50% by weight based on the total weight of the incense stick. 4. The incense stick according to claim 1, wherein the combustion retardant is rice bran, and is contained in an amount of 7 to 50% by weight based on the total weight of the incense stick. 5. The incense stick according to claim 1, wherein the combustion retardant is aluminum hydroxide, and is added in an amount of 5 to 45% by weight based on the total weight of the incense stick. 6. The combustion retardant is light magnesium carbonate,
The incense stick according to claim 1, which is 2 or 3 kinds selected from organic acid hydrazide and rice bran. 7. The incense stick according to claim 1, wherein the amount of the combustion retardant added is 5 to 50% by weight based on the total weight of the incense stick.